Question

A potential barrier of $0.50 \,V$ exists in a $p-n$ junction, If the depletion region is $5.0 \times 10^{-7}\,m$ thick, what is i the electric field in this region?

• A. $10^6\, V/m$
• B. $10^7 \,V/m$
• C. $10^5 \,V/m$
• D. $10^4 \,V/m$

Answer 1

Answer: (A)

Electric field,
$E = \frac{V}{d}$
$=\frac{0.50\,V}{5.0 \times 10^{-7}\,m}$
$=1.0\times 10^6 \,Vm^{-1}$